Diagenesis of Carbonate Sediments: Interaction of Magnesium in Sea Water with Mineral Grains

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Science  08 Jul 1966:
Vol. 153, Issue 3732, pp. 188-191
DOI: 10.1126/science.153.3732.188


Samples of natural fine-grained carbonate sediment from Florida Bay, Florida, undergo mole-for-mole cation exchange with aqueous solutions of MgCl2 and CaCl2 in the laboratory. The exchange reaction, which involves the surface of the grains of sediment, can be essentially described by a simple mass action-law equation. Enrichment of Mg++ beyond the amounts found within particle interiors should take place on the surface of CaCo3 sediments immersed in sea water; it may be on both exchangeable and unexchangeable sites.